diff --git a/data/hostname/thyssen.internal.softwareheritage.org.yaml b/data/hostname/thyssen.internal.softwareheritage.org.yaml
index 2047dd0e..9e0a9ef6 100644
--- a/data/hostname/thyssen.internal.softwareheritage.org.yaml
+++ b/data/hostname/thyssen.internal.softwareheritage.org.yaml
@@ -1,7 +1,10 @@
 ---
 
 # Add ddouard as jenkins admin
 users:
   ddouard:
     groups:
       - sudo
+
+dar::backup::exclude:
+  - /var/lib/docker/